A. Lange & Söhne dresses the 1815 UP/DOWN in blue and pink gold

The 1815 UP/DOWN reference 244.037 pairs a blue dial made of 925 silver with the warmth of a 750 pink-gold case. Across its 37.5 mm diameter, Arabic hour numerals, a railway-track minute scale and the paired subdials establish a visual link to traditional precision instruments. The small dial at eight o'clock tracks the available mainspring energy with the German AUF and AB markings; small seconds balance the composition opposite it.

Under the sapphire caseback, the hand-wound calibre L051.2 brings a 72-hour reserve and traditional Saxon movement finishing. The watch measures 8.7 mm thick and is restricted to 300 examples. It is an exercise in how a surprisingly bold colour can coexist with Lange's meticulous classical design.